Enrico feroldi



E. FEROLDI.

CARBUREIER FOR EXPLOSION ENGINES.

APPLICATION FILED mac-14. ms.

1 ,307, 396 Patented J un 24,1919.

OFFICE.

ENRICO FEROLDI, 0F TURIN, ITALY.

'ohanumrrnn FOR EXPLOSION-ENGINES.

Specification of Letters Iatent. Patented June 24,, 1919 Original application filed February 28, 1918, Serial No. 219,556. Divided and this application filed Decemher 14,1918. Serial No. 266,757.

sion of U. S. application N. 219,556, filed Febr. 28, 19l8 andthe subject-matter of this application havin been first described in said U. S. application N. 219,556.

This inventionrelates to explosion engines as for its object an arrangement by which provided with two or more carbureters and;

the supply of fuel to said carbureters is con-- trolled accordin to requirements also in the case the float 0 one or moreof said carbureters comes out of operation, by way of ex: ample, because it is holed or damaged in an manner, this causing the same to become fu 1 and the operation ofthe carbureter not satisfactory. v W

As it is known, in such a case, in the usual constructions of carbureters, the carbureter or carbureters fed by the chamber-or chambers having their respective floats out of operation, is or are liable to flooding as the fuel fed thereto under these circumstances is in excess with respect to requirements.

According to this invention the float chamber of thetwo or more carbureters feeding the engine cylinders are interconnected by means of a ductlopening in each of said chamber sabove the level the fuel must reach into the same for securing the proper supply to the carbureter nozzles.

The annexed drawing-shows by way of exam 1e two constructions of carbureters accor ing to the invention and Figure 1 is the section of an arrangement comprising two carbureters, the section bein fmade on ate the needle or pin '1 which is adapted to According to this invention the float chambers 10f the carbureters feeding the engine are caused to communicate with each other by means of orifices 12 opening above the required constant level of the fuel in said chambers, said orifices being interconnected by means of a passage 13.

By such, an arrangement should either of floats 4 become damaged and filled in with fuel so aS to be sunk into the fuel and prevented from properly operating to control the fuel inlet into its chamber 1, the excess of fuel coming into this chamber overflows through orifices 12 and passage 13 into the float chamber 1 of the other carbureter, the direct supply of fuel from main tank into this chamber through connecting piece 2 and pipe leading thereto being reduced and prevented, if required, by the needle 7 operated by the float at of this chamber 1.

Under the circumstances which are enerally' found in practice, the inlet'ori ce'of the fuel into chamber 1 is hardly suflicient to feed fuel to two carbureters, so that in the above described case in which the float of one of the carbureters is sunk and out of 3 by the operation of the float of [the other the central axes of the float cham' ers; Fig.

2 is the like section of another arrangement in which the float-chambers of the two carbureters are integral with each other.

As shown in Fig. 1, both carbureters I and II are provided with a float chamber 1 into which the fuel is supplied through connecting iece 2 connected with the pipe leadin to t e main fuel "tank not shown, the fue being fed as usual from said chamber 1 to the carbureter nozzle through passage 3.

Inside each chamber 1 is arranged a float 4 which operates arms 5 pivoted at 6 on the cover of the chamber 1 and intended to actucarbureter.

Obviously the in the case of a plurality of carbureters by interconnecting their float chambers by means of passages opening into the same above the constant level of fueltherein; as above described, the excess of fuel supplied into the float chamber of any carburete-r having its float out of operation overflows into one or more of the other ones the direct supply to these latter ones from the main tank being controlled by their respective floats and needles.

Further, according to this invention, any possibility may be prevented that the fuel supplied to one of the float chambers, when the float thereof is out of operation, may be in excess with respect to the-fuel required for feedin both "or all carbureters, this fact being liab e to produce flooding of all carbusame result may be obtained reters notwithstanding their direct communication with main tank is cut off by theoperation of their respective float with exception of the chamber having its float sunk. To this end may be used any arrangement adapted to limit rising of the needles 7 operated by said floats and controlling the fuel inlet into chambers 1. i

A construction of such an arrangement is shown by way of example on Fig. 1; in thiscon'struction, on the bottom of each cha1nber 1 is provided a sleeve 9 having holes' 10 and intended to support and stop the float l at a given distance from said bottom when said float moves to come into contact with said bottom for any reason.

The needle 7 which, as usually, passes through the central hole of the float, is correspondingly provided with an enlarged head 8 adapted to come into contact with the lower" surface of the float when this latter is supported bysleeve 9, so that said needle isstopped after it has been raised to a given extent which may be predetermined according to circumstances in such a way as to reduce the amount of fuel supply into chamber 1.

The same result may also be obtained by means of a cap 11 mounted on the cover of the float chamber 1, this cap encircling the upper head of needle 7 and limiting its upward stroke, independently of the control of the respective float.

In any case the operation of the device is identical with that above described and does not require further specification.

Fig. 2 shows a construction of the arrangement according to this invention in which twin carbureters have their float chambers 11 close to or integral with each other and interconnected by a port 13 opening into said chambers 1 above the normal level of fuel therein; the fuel is fed into said chambers from a lower common passage 2 connected with the main fuel tank not shown. The operation is identical with that de scribed in connection with Fi 1.

By the arrangement according to this invention is prevented in any case that the carbureter or carbureters have their respective floats out of operation the liability of flooding by way of the excess of fuel sup plied thereto is prevented.

What I claim as my invention and desire to secure by United States Letters Patent is: 1. In an explosion engine, a plurality of carbureters feeding the en ine cylinders, each carbureter having a float chaniberfeed- ,ing its nozzle and connected with the main fuel tank, means for controlling the fuel inlet into each constant level chamber, the wall of each of said chambers having an opening above the fuel constant level therein, and means interconnecting said openings to cause the excem of fuel into any of said float chambers, when the respective controlling means are out of operation, to overflow into other ones.

2. In an explosion engine, a plurality of carbureters feeding the engine cylinders, each carbureter having a float chamber feeding its nozzle and connected with the main fuel tank, means for controlling the fuel inlet into each float chamber, afloat inside each chamber to operate said controlling means, the wall of each float chamber havinv'an opening above the fuel constant level therein, and means interconnecting said openings to cause the excess fuel into any of said float chambers when the respective float and controlling means are out of operation, to overflow into other ones.

3. In an explosion engine, two carbu'reters feeding the engine cylinders, twin float chambers each feeding a nozzle and connected with. the main fuel tank, means for controlling the fuel inlet intoeach float chamber, a float inside each chamber to operate said controlling means, .a passage interconnecting said float chambers above the constant fuel level therein for causing the ex-' cess fuel inside either of them, when the respective float and controlling means are out of operation, to overflow into other ones.

4:. In an explosion engine, a plurality of carbureters, feeding the engine cylinders. each carbureter having a float chamber feeding its nozzle and connected with the main fuel tank, a valve for controlling th fuel inlet into each chamber, afloat inside each chamber to operate said valve, the wall of each float chamber having an opening above the fuel constant level therein, means interconnecting said openings to cause the excess fuel inside any of said chambers, when the respective float and valve are out of operation, to overflow into other ones, and means in .each float chamber for limiting the rising of the respective valve.

Signed at Turin, Italy, this 13th day of November, A. D. 1918.

ENRICO F EROLDI. 

